welcome to Beoworld and hopefully a life of B&O pleasure
B&O promote a natural sound
I suspect your ears are conditioned to the bose subwoofer
I have the same speakers as you
They are an absolute delight - and I never get listener fatigue - I can sit for hours in complete sonic pleasure or audio heaven
I don't have the BC2 so I would hazard a guess that in fact yours should sound better
If they are brand new speakers then they will need to be "run in"
I think the Beolab 3s needed about 100 hours to "loosen" them up
Just to check the set-up, you cables should run like this:
BC2 --PowerLink x 1--BeoLab 11--PowerLink x 1--PowerLink splitter--PowerLink x 2--Beolab 3s x2
And also check the switch settings on all 3 speakers
BTW what styles of music do you like / play ?
First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*